基于特征值灵敏度的D-PMSG并网系统次同步振荡特性研究  

Research on Subsynchronous Oscillation Characteristics of D-PMSG Grid-connected System based on Eigenvalue Sensitivity

作　　者：田宇 彭志炜[1] 王杰 高勇 TIAN Yu;PENG Zhi-Wei;WANG Jie;GAO Yong(Electrial Engineering College,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025

出　　处：《节能技术》2020年第5期399-406,共8页Energy Conservation Technology

基　　金：贵州省电力系统智能化技术重点实验室建设(Z103188)。

摘　　要：在直驱永磁风电机组并入弱交流电网时,有可能会发生次同步振荡现象。为了研究系统参数对次同步振荡的影响趋势和程度,常采用特征值灵敏度分析方法。因此,本文基于特征值灵敏度分析方法,研究系统参数中电网强度、风速、机侧控制器参数、网侧控制器参数以及锁相环控制参数对系统次同步振荡的影响,并通过搭建PSCAD/EMTDC仿真模型进行实验验证。研究结果表明,直驱风电并网系统次同步振荡模态是由多个系统参数共同导致,且各个控制参数对次同步振荡的影响趋势和影响程度不同。When D-PMSG is integrated into a weak AC power grid,sub-synchronous oscillation may occur.In order to study the variation trends and degrees of system parameters on sub-synchronous oscillation,the eigenvalue sensitivity analysis method is mainly used.Therefore,based on the sensitivity analysis method of eigenvalues,this paper studies the effects of power grid strength,wind speed,machine-side controller parameters,grid-side controller parameters,and phase-locked loop control parameters on the system sub-synchronous oscillation in the system parameters.The model is experimentally verified.The research results show that the subsynchronous oscillation mode of the direct-drive wind power grid-connected system is caused by multiple system parameters,and the influence trend and degree of each control parameter on the subsynchronous oscillation are different.

关 键 词：直驱风电 次同步振荡 特征值灵敏度 控制器参数 仿真模型 

分 类 号：TM53[电气工程—电器]